protection ct
protection ct
(OP)
how to decide on ct accuracy class/composite error for protection purpose like 5p10 or 5p20.
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RE: protection ct
RE: protection ct
thanks a lot for your reply
RE: protection ct
eg. if we have maximum fault current available as 15 kA, and our CT current rating is 1000/5 then 15000/1000 =15.
therefore a CT XP20 is sufficient, X is determined based on the accuracy requirement eg 5 , 10 etc.